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air leakage

   Also found in: Acronyms 0.01 sec.
air leakage [′er ‚lēk·əj]
(mechanical engineering)
In ductwork, air which escapes from a joint, coupling, and such.
The undesired leakage or uncontrolled passage of air from a ventilation system.
air leakage
1. The volume of air which flows through a closed window or door in a given length of time as a result of the difference in air pressure on its opposite faces.
2. In ductwork, air which escapes from a joint, coupling, etc.
3. The undesired leakage or uncontrolled passage of air from a ventilation system.
4. The flow of uncontrolled air through cracks or openings in an enclosure within a building (such as a HVAC plenum) or through the surfaces which enclose the building.
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The National Fenestration Rating Council is a good first stop, since o it rates windows on factors like air leakage and offers a U-factor measurement of how well the window guards against heat loss.
Window shopping: the latest in energy-efficient windows by MacDonald, Christine; Provey, Joe / E
Additionally, the concrete prevents air leakage and slows down heat from escaping therefore a concrete home stays warmer in the winter and cooler in the summer.
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Pneumothorax collapsed lung causes Risk Factors:- Spontaneous pneumothorax occurs in 20 to 40 aged, caused by air leakage from ruptured blebs (blister like accumulations of fluid) that are present at birth, may be caused by an emphysematous bleb that ruptures during exercise or coughing or from tuberculosis or cancer, may also collapse spontaneously in interstitial lung disease.
About Pneumothorax - Collapsed Lung by Nurit Setty / Health, general community
 
 
 
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